i = true
console.log(i, typeof (i))


console.log(Boolean(null))
console.log(Boolean(undefined))
console.log(Boolean(''))
console.log(Boolean(0))
console.log(Boolean('     ')) //true

if(-6){
    console.log("yes")
}else{
    console.log('no')
}


console.log(1 == 1, 1 == 2, '1' == 1, '1' === 1)
